down someone's alley

noun pl. alleys

1. a lane in a garden or park, bordered by trees or shrubs
2. a narrow street or walk, specif., a lane behind or alongside a row of buildings or between two rows of buildings that face on adjacent streets
3. Baseball the part of the outfield between center field and either left field or right field
   also power alley
4. Bowling lane (senses & )
5. Tennis either of the narrow lanes, on opposite sides of the court, that extend the singles area for playing doubles